chloral

Also called trichloroacetaldehyde (CCl3CHO), a colorless, oily
liquid made by reacting chlorine and ethanol
or acetaldehyde, used chiefly in the
manufacture of DDT. Molecular weight 147.4, melting point -57.5°C.

Chloral hydrate (CCl3CH(OH)2)
is a colorless, crystalline solid made by reacting chloral and water and
used as a sedative, as it is a depressant
of the central nervous system. It is toxic in excess, and especially when
mixed with alcohol to give make "Mickey Finns" or "knockout drops." Habitual
use produces drug addiction and gastritis. Melting point 57°C.